The HP ProDesk 400 G6 SFF is a pre-built entry-level business desktop computer first released in 2019. The motherboard is using the B360 chipset and supports 9th gen Intel Core processor, and 64GB of DIMM DDR4-2666 memory.
HP ProDesk 400 G6 SFF is a Small form factor computer. The Small Form Factor (SFF) is an in-between model. It has less space for the larger form factors (Mid tower, Mini tower, and Desktop), but it is still easily upgradable. Usually the SFF come with 2x PCIe slots, so fitting a low profile graphics card is possible.